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Date:   Fri, 31 Aug 2018 14:06:36 +0200
From:   Peter Zijlstra <>
To:     Srikar Dronamraju <>
Cc:     Ingo Molnar <>,
        LKML <>,
        Mel Gorman <>,
        Rik van Riel <>,
        Thomas Gleixner <>,
        Michael Ellerman <>,
        Heiko Carstens <>,
        Suravee Suthikulpanit <>,
        linuxppc-dev <>,
        Andre Wild <>,
        Benjamin Herrenschmidt <>
Subject: Re: [PATCH] sched/topology: Use Identity node only if required

On Fri, Aug 31, 2018 at 04:56:18PM +0530, Srikar Dronamraju wrote:
> This was the same in my previous posting too. Before the topology update
> happened, all the cpus would be in SMT, DIE. The topology updates can be
> disabled using a kernel parameter topology_updates=off. Its documented under
> as
>       topology_updates= [KNL, PPC, NUMA] Format: {off} Specify if the kernel
>       should ignore (off) topology updates sent by the hypervisor to this
>       LPAR.
> and is not something new in powerpc.

Doesn't mean it isn't utterly broken.

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